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Phase Transition and Multistability in Dicke Dimer.

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  • 1<a href="https://ror.org/007nf8q70">State Key Laboratory for Mesoscopic Physics</a>, School of Physics, Frontiers Science Center for Nano-optoelectronics, &amp; Collaborative Innovation Center of Quantum Matter, Peking University, Beijing 100871, China.

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Photon hopping in hybrid quantum systems of cold atomic gas and optical cavities reveals diverse quantum phases. This study demonstrates photon hopping as a key method for controlling quantum phase transitions and multistability.

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Area of Science:

  • Quantum physics
  • Atomic physics
  • Cavity quantum electrodynamics

Background:

  • Hybrid quantum systems combining cold atomic gases and optical cavities exhibit complex phenomena.
  • These systems are known to host exotic quantum phases, including phase transitions and multistabilities.
  • Understanding the dynamics and control of these phases is crucial for quantum technologies.

Purpose of the Study:

  • To investigate the impact of photon hopping between two Dicke cavities on quantum phases.
  • To analyze both steady-state phases and dynamic processes within this hybrid system.
  • To explore the potential of photon hopping as a tool for manipulating quantum behavior.

Main Methods:

  • Analytical derivation of steady-state phases for a generic dimer system (two potentially non-identical cavities).
  • Numerical confirmation of the analytically obtained steady-state phases.
  • Exact analytical solutions for all phases in the special case of identical cavities.

Main Results:

  • The study identifies and characterizes rich quantum phases arising from photon hopping.
  • Both steady-state and dynamic behaviors are shown to be significantly influenced by photon hopping.
  • The research confirms the existence of these phases through both analytical and numerical approaches.

Conclusions:

  • Photon hopping is demonstrated as an effective and versatile method for controlling quantum phases in hybrid quantum systems.
  • This mechanism can be utilized to induce and manipulate multistable quantum behaviors.
  • The findings offer new pathways for designing and controlling quantum states in atomic-cavity systems.